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Alkylaniline carboxylate or sulphonate surfactant

A surfactant and alkyl aniline technology, applied in drilling compositions, chemical instruments and methods, organic chemistry, etc., can solve problems such as damage, achieve low cost, increase oil recovery, and huge economic benefits Effect

Inactive Publication Date: 2007-10-17
孙安顺
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the ASP flooding system, it contains high-concentration alkali, such as sodium hydroxide and sodium carbonate, which will cause huge damage to the formation and oil wells during use. Therefore, a low-cost, polluting A small amount of surfactant is necessary

Method used

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  • Alkylaniline carboxylate or sulphonate surfactant
  • Alkylaniline carboxylate or sulphonate surfactant
  • Alkylaniline carboxylate or sulphonate surfactant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The carboxylate or sulfonate surfactant of alkylaniline of the present invention is the compound of following general formula:

[0033]

[0034] Among them: m is any positive integer from 1 to 20; n is any positive integer from 0 to 12; i is any positive integer from 0 to 12; R 1 H, -CH 3 Any one of them; R stands for -COOM, -SO 3 M.

[0035]

[0036] -CH 2 NHCH 2 COOM or -CH 2 NHCH 2 CH 2 COOM; -COOM, -SO above 3 M, -CH 2 NHCH 2 COOM, -CH 2 NHCH 2 CH 2 M in COOM is one of sodium, potassium, monoethanolamine, diethanolamine or triethanolamine.

[0037] Among them, preferably m is any integer of 9 to 18; n is any positive integer of 0 to 4; i is any positive integer of 1 to 3; R 1 for H; R for -SO 3 M or -COOM; M is any one of sodium, potassium, monoethanolamine, and diethanolamine.

[0038] More preferably, m is any integer from 9 to 12; n is any positive integer from 0 to 2; i is any positive integer from 1 to 2; M is sodium or potassium.

[00...

Embodiment 2

[0041] Synthesis of Potassium p-Dodecylaniline Propionate Surfactant

[0042] Add 261g of p-dodecylaniline and 250ml of benzene into a 1000ml three-necked flask equipped with a condenser, a stirrer, and a constant pressure burette. When the temperature rises to 65°C, add 100g of methyl acrylate dropwise, and continue the reaction for 4 hours after the drop is complete. Then raise the temperature to 120°C to remove benzene and excess methyl acrylate.

[0043] In addition, 70 g of potassium hydroxide and 600 g of water were added to a 1000 ml three-necked flask equipped with a condenser, a stirrer, and a constant pressure burette, and the temperature was raised to reflux, and the intermediate product prepared above was added dropwise. After the dropwise addition was completed, the reaction was carried out for 3 hours. The temperature was lowered to 50° C., and 200 g of propanol was added. That is, a surfactant solution containing 20% ​​Li was obtained.

Embodiment 3

[0045] Synthesis of Potassium p-Nonylaniline Undecanoate Surfactant

[0046] Add 219g of p-nonylaniline and 250ml of benzene into a 1000ml three-neck flask equipped with a condenser, agitator, and a constant pressure burette, raise the temperature to 65°C, start adding 240g of methyl undecylenate dropwise, and continue the reaction for 4 hours after the dropwise completion . Heating to remove benzene and excess undecylenic acid methyl ester.

[0047] Add 40 g of potassium hydroxide, 620 g of water, and 240 g of the intermediate product prepared above into a 2000 ml three-neck flask equipped with a condenser, a stirrer, and a constant pressure constant pressure tube, and heat up to reflux for 3 hours of reaction. The temperature was lowered to 50° C., and 300 g of butanol was added to the system. That is, a surfactant solution containing 20% ​​Li was obtained.

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Abstract

The prescription system for oil extraction is provided with the carboxylate or mahogany sulfonate of the alkylbenzenamine surface active agent synthesized by alkylbenzenamine, polymer, alkali and water. The invention forms superlow surface tension of 10-3 to 10-5mN / m with the underground crude oil at the condition of no alkali or low alkali, which not only conquers the great damage to the stratum and oil well by the high-concentrated alkali, but also meets the environment requirement and can obtain an ideal oil recovery effect without damage to the equipments. Meanwhile, it can be used at highly mineralized stratum and has a biodegradation resistance, a low cost and increases the crude oil recovery ratio more than 27%.

Description

technical field [0001] The invention relates to a surfactant synthesized from alkylaniline, in particular to a carboxylate or sulfonate surfactant of alkylaniline. Background technique [0002] After the oil field enters the high water cut period, the remaining oil is trapped in the pores of the reservoir rocks as a discontinuous oil film, and the two main forces acting on the oil droplets are viscous force and capillary force. If an appropriate surfactant system is used to reduce the interfacial tension between oil and water, the resistance caused by the deformation of oil droplets when the residual oil is moved is reduced, thereby enhancing oil recovery. At present, there are roughly the following injection systems for surfactants: (1) active water flooding; (2) micellar solution flooding; (3) low interfacial tension system flooding; (4) ASP flooding. Among them, ASP flooding (alkali-polymer-surfactant) is a new method of enhancing oil recovery developed in the 1980s. It...

Claims

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Application Information

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IPC IPC(8): C09K8/584C07C229/16C07C309/14
Inventor 李宣京孙安顺刘芳韩庆双
Owner 孙安顺
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